Definition of plagiarism
Plagiarism refers to intellectual theft i.e. using someone else’s thoughts in your own text without referencing them. It’s taking the credit for someone else’s work, which goes against the rules of academia. Quoting is not banned, quite the opposite in fact. The author must be named though. Plagiarism can take on a number of different forms. It is not only copying but also an uncredited translation or using someone else’s ideas without referencing the author.
Plagiarism can definitely be uncovered. There is special software for this. If plagiarism is detected, there are serious consequences such as failure of your work or exmatriculation to denial of a title. Copyright infringement and fraud are punishable criminal offences. So you should familiarise yourself with the conventions of quotation to know the grey areas and avoid plagiarism in all its forms.